What is the value of y in the equation 6.4x + 2.8y = 44.4, when x = 3?

Solution:

Given: Equation is 6.4x + 2.8y = 44.4

When x = 3,

6.4 × 3 + 2.8y = 44.4

By further calculation by isolating the variable 'y', we get

19.2 + 2.8y = 44.4

So we get

2.8y = 44.4 - 19.2

2.8y = 25.2

Dividing both sides by 2.8

2.8y/2.8 = 25.2/2.8

y = 9

Therefore, the value of y is 9.

What is the value of y in the equation 6.4x + 2.8y = 44.4, when x = 3?

Summary:

The value of y in the equation 6.4x + 2.8y = 44.4, when x = 3 is 9.